#include <string>
#include <vector>
#include <algorithm>
#include <iostream>
using namespace std;
int main() {
vector<string> vs;
vs.push_back(string ("Sunday"));
vs.push_back (string ("Monday"));
...
vs.push_back (string ("Saturday"));
random_shuffle(vs.begin(),
vs.end()); /* 打亂順序 */
for (int i = 0; i << 7; i++)
cout<<vs[i]; /* 顯示打亂順序後的元素 */
}